In the 1960s and 1970s in the middle and lower reaches of the Erren River Basin, illegal metal smelters were rampant. Many companies dumped smelted metal waste on the river bank, resulting in endless pollution incidents along the Erren River. The green oyster incident occurred, the aluminum smelting industry polluted the water quality, etc. After decades of continuous efforts by the government to effectively control the implementation progress of relevant units in Erren River renovation and various water quality improvements, the serious pollution of Erren River has been reduced by 81%. In 2017, due to the heavy rain, the waste beside the Erren River was exposed. The Environmental Protection Bureau of the Tainan City Government urgently carried out a temporary packing operation. The waste was temporarily placed in the old diesel power meter station of Campus, South District, Tainan City, and was entrusted to be properly cleaned and disposed of A pollution investigation was carried out, and all of them were disposed of in March 2010.
However, in July 2010, the embankment and the river bed of Errenxi Erxing Niangniang Temple on the other side were washed out by the heavy rain. The Sixth River Bureau of the Water Conservancy Department of the Ministry of Economic Affairs carried out excavation in July 2010, March and May 110. Packing and cleaning operations, the waste is temporarily placed in the old diesel power meter station of Campus in South District, Tainan City, a total of 33 bags (22 metric tons), because the temporary waste is not a long-term solution, and because most of the waste is electronic waste containing Hazardous industrial waste, if not properly sorted, will be sent to landfills or incineration plants, which may cause secondary pollution or burden treatment facilities. In order to achieve effective treatment technology and meet economic conditions, the plan is to classify and screen 22 tons of waste into combustible, non-combustible, and recyclable waste, etc., and entrust private clearing and processing organizations that have obtained permission for the classified waste according to the waste Properly remove and dispose of waste.